How to use an electric soldering iron? Correct usage method of electric soldering iron
1. When selecting appropriate solder, low melting spot welding wire should be used for soldering electronic components.
2. Soldering flux, dissolve 25% rosin in 75% alcohol by weight as the flux.
3. Before using an electric soldering iron, tin should be applied. The specific method is to heat the soldering iron, and when it can just melt the solder, apply flux, and then evenly coat the soldering iron head with solder, so that the soldering iron head can eat a layer of tin evenly.
4. Welding method: Polish the solder pads and pins of the components with fine sandpaper and apply flux. Dip an appropriate amount of solder with a soldering iron tip, touch the solder joint, and wait for all the solder on the solder joint to melt and immerse the component lead head. Gently lift the soldering iron tip up and away from the solder joint along the pins of the component.
5. The welding time should not be too long, otherwise it is easy to scald the components. If necessary, tweezers can be used to clamp the pins to help dissipate heat.
6. The solder joints should have a sinusoidal peak shape, a bright and smooth surface, with Wuxi spikes and moderate tin content.
7. After welding is completed, the residual soldering flux on the circuit board should be cleaned with alcohol to prevent the carbonized flux from affecting the normal operation of the circuit.
8. Integrated circuits should be soldered last, and the soldering iron should be reliably grounded, or the residual heat should be used for soldering after power off. Alternatively, use a dedicated socket for integrated circuits, solder the socket and then plug the integrated circuit in.
9. The electric soldering iron should be placed on the soldering iron holder.
